Thanks - No, not intending to push any great big buttons, as stated; vagrant curiosity was all.
Thing that kicked it off was a yarn I heard (in the Pub) in which the "Bad sayer" could not be got at by the "Call ee". Seems there is a 'thing' professional privilage (I think ?) that allows for professional opinion to be a defence. Could be all rubbish, But always happy to head good advice.

It's a murky old world though, ain't it.
.